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<title>class Bundler::GemVersionPromoter - bundler: Ruby Standard Library Documentation</title>


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    <li ><a href="#method-c-new">::new</a>
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    <li ><a href="#method-i-filter_dep_specs">#filter_dep_specs</a>
    <li ><a href="#method-i-level-3D">#level=</a>
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    <main role="main" aria-labelledby="class-Bundler::GemVersionPromoter">
    <h1 id="class-Bundler::GemVersionPromoter" class="class">
      class Bundler::GemVersionPromoter
    </h1>

    <section class="description">
    
<p>This class contains all of the logic for determining the next version of a <a href="../Gem.html"><code>Gem</code></a> to update to based on the requested level (patch, minor, major). Primarily designed to work with <a href="Resolver.html"><code>Resolver</code></a> which will provide it the list of available dependency versions as found in its index, before returning it to to the resolution engine to select the best version.</p>

    </section>

      <section id="5Buntitled-5D" class="documentation-section">



        <section class="attribute-method-details" class="method-section">
        <header>
        <h3>Attributes</h3>
        </header>

          <div id="attribute-i-level" class="method-detail">
            <div class="method-heading attribute-method-heading">
              <span class="method-name">level</span><span
                class="attribute-access-type">[R]</span>
            </div>

            <div class="method-description">
              
              </div>
            </div>
          <div id="attribute-i-pre" class="method-detail">
            <div class="method-heading attribute-method-heading">
              <span class="method-name">pre</span><span
                class="attribute-access-type">[RW]</span>
            </div>

            <div class="method-description">
              
              </div>
            </div>
          <div id="attribute-i-strict" class="method-detail">
            <div class="method-heading attribute-method-heading">
              <span class="method-name">strict</span><span
                class="attribute-access-type">[RW]</span>
            </div>

            <div class="method-description">
              <p>By default, strict is false, meaning every available version of a gem is returned from sort_versions. The order gives preference to the requested level (:patch, :minor, :major) but in complicated requirement cases some gems will by necessity be promoted past the requested level, or even reverted to older versions.</p>

<p>If strict is set to true, the results from <a href="GemVersionPromoter.html#method-i-sort_versions"><code>sort_versions</code></a> will be truncated, eliminating any version outside the current level scope. This can lead to unexpected outcomes or even VersionConflict exceptions that report a version of a gem not existing for versions that indeed do existing in the referenced source.</p>
              </div>
            </div>
            </section>


                <section id="public-class-5Buntitled-5D-method-details" class="method-section">
                <header>
                <h3>Public Class Methods</h3>
                </header>

                  <div id="method-c-new" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">new</span><span
                                class="method-args">()</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Creates a <a href="GemVersionPromoter.html"><code>GemVersionPromoter</code></a> instance.</p>

<p>@return [GemVersionPromoter]</p>

                              <div class="method-source-code" id="new-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 29</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>
  <span class="ruby-ivar">@level</span> = <span class="ruby-value">:major</span>
  <span class="ruby-ivar">@strict</span> = <span class="ruby-keyword">false</span>
  <span class="ruby-ivar">@pre</span> = <span class="ruby-keyword">false</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                          </section>

                <section id="public-instance-5Buntitled-5D-method-details" class="method-section">
                <header>
                <h3>Public Instance Methods</h3>
                </header>

                  <div id="method-i-level-3D" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">level=</span><span
                                class="method-args">(value)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>@param value [Symbol] One of three Symbols: :major, :minor or :patch.</p>

                              <div class="method-source-code" id="level-3D-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 36</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">level=</span>(<span class="ruby-identifier">value</span>)
  <span class="ruby-identifier">v</span> = <span class="ruby-keyword">case</span> <span class="ruby-identifier">value</span>
      <span class="ruby-keyword">when</span> <span class="ruby-constant">String</span>, <span class="ruby-constant">Symbol</span>
        <span class="ruby-identifier">value</span>.<span class="ruby-identifier">to_sym</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-identifier">raise</span> <span class="ruby-constant">ArgumentError</span>, <span class="ruby-node">&quot;Unexpected level #{v}. Must be :major, :minor or :patch&quot;</span> <span class="ruby-keyword">unless</span> [<span class="ruby-value">:major</span>, <span class="ruby-value">:minor</span>, <span class="ruby-value">:patch</span>].<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">v</span>)
  <span class="ruby-ivar">@level</span> = <span class="ruby-identifier">v</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-i-major-3F" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">major?</span><span
                                class="method-args">()</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>@return [bool] Convenience method for testing value of level variable.</p>

                              <div class="method-source-code" id="major-3F-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 62</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">major?</span>
  <span class="ruby-identifier">level</span> <span class="ruby-operator">==</span> <span class="ruby-value">:major</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-i-minor-3F" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">minor?</span><span
                                class="method-args">()</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>@return [bool] Convenience method for testing value of level variable.</p>

                              <div class="method-source-code" id="minor-3F-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 67</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">minor?</span>
  <span class="ruby-identifier">level</span> <span class="ruby-operator">==</span> <span class="ruby-value">:minor</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-i-pre-3F" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">pre?</span><span
                                class="method-args">()</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>@return [bool] Convenience method for testing value of pre variable.</p>

                              <div class="method-source-code" id="pre-3F-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 72</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">pre?</span>
  <span class="ruby-identifier">pre</span> <span class="ruby-operator">==</span> <span class="ruby-keyword">true</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-i-sort_versions" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">sort_versions</span><span
                                class="method-args">(package, specs)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Given a <a href="Resolver/Package.html"><code>Resolver::Package</code></a> and an Array of Specifications of available versions for a gem, this method will return the Array of Specifications sorted (and possibly truncated if strict is true) in an order to give preference to the current level (:major, :minor or :patch) when resolution is deciding what versions best resolve all dependencies in the bundle. @param package [Resolver::Package] The package being resolved. @param specs [Specification] An array of Specifications for the package. @return [Specification] A new instance of the Specification Array sorted and</p>

<pre>possibly filtered.</pre>

                              <div class="method-source-code" id="sort_versions-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 55</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">sort_versions</span>(<span class="ruby-identifier">package</span>, <span class="ruby-identifier">specs</span>)
  <span class="ruby-identifier">specs</span> = <span class="ruby-identifier">filter_dep_specs</span>(<span class="ruby-identifier">specs</span>, <span class="ruby-identifier">package</span>) <span class="ruby-keyword">if</span> <span class="ruby-identifier">strict</span>

  <span class="ruby-identifier">sort_dep_specs</span>(<span class="ruby-identifier">specs</span>, <span class="ruby-identifier">package</span>)
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                          </section>

                <section id="private-instance-5Buntitled-5D-method-details" class="method-section">
                <header>
                <h3>Private Instance Methods</h3>
                </header>

                  <div id="method-i-either_version_older_than_locked-3F" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">either_version_older_than_locked?</span><span
                                class="method-args">(a, b, locked_version)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              

                              <div class="method-source-code" id="either_version_older_than_locked-3F-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 119</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">either_version_older_than_locked?</span>(<span class="ruby-identifier">a</span>, <span class="ruby-identifier">b</span>, <span class="ruby-identifier">locked_version</span>)
  <span class="ruby-identifier">locked_version</span> <span class="ruby-operator">&amp;&amp;</span> (<span class="ruby-identifier">a</span>.<span class="ruby-identifier">version</span> <span class="ruby-operator">&lt;</span> <span class="ruby-identifier">locked_version</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">b</span>.<span class="ruby-identifier">version</span> <span class="ruby-operator">&lt;</span> <span class="ruby-identifier">locked_version</span>)
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-i-filter_dep_specs" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">filter_dep_specs</span><span
                                class="method-args">(specs, package)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              

                              <div class="method-source-code" id="filter_dep_specs-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 78</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">filter_dep_specs</span>(<span class="ruby-identifier">specs</span>, <span class="ruby-identifier">package</span>)
  <span class="ruby-identifier">locked_version</span> = <span class="ruby-identifier">package</span>.<span class="ruby-identifier">locked_version</span>
  <span class="ruby-keyword">return</span> <span class="ruby-identifier">specs</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">locked_version</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">major?</span>

  <span class="ruby-identifier">specs</span>.<span class="ruby-identifier">select</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">spec</span><span class="ruby-operator">|</span>
    <span class="ruby-identifier">gsv</span> = <span class="ruby-identifier">spec</span>.<span class="ruby-identifier">version</span>

    <span class="ruby-identifier">must_match</span> = <span class="ruby-identifier">minor?</span> <span class="ruby-operator">?</span> [<span class="ruby-value">0</span>] <span class="ruby-operator">:</span> [<span class="ruby-value">0</span>, <span class="ruby-value">1</span>]

    <span class="ruby-identifier">all_match</span> = <span class="ruby-identifier">must_match</span>.<span class="ruby-identifier">all?</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">idx</span><span class="ruby-operator">|</span> <span class="ruby-identifier">gsv</span>.<span class="ruby-identifier">segments</span>[<span class="ruby-identifier">idx</span>] <span class="ruby-operator">==</span> <span class="ruby-identifier">locked_version</span>.<span class="ruby-identifier">segments</span>[<span class="ruby-identifier">idx</span>] }
    <span class="ruby-identifier">all_match</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-identifier">gsv</span> <span class="ruby-operator">&gt;=</span> <span class="ruby-identifier">locked_version</span>
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-i-move_version_to_end" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">move_version_to_end</span><span
                                class="method-args">(result, version)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              

                              <div class="method-source-code" id="move_version_to_end-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 140</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">move_version_to_end</span>(<span class="ruby-identifier">result</span>, <span class="ruby-identifier">version</span>)
  <span class="ruby-identifier">move</span>, <span class="ruby-identifier">keep</span> = <span class="ruby-identifier">result</span>.<span class="ruby-identifier">partition</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">s</span><span class="ruby-operator">|</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">version</span>.<span class="ruby-identifier">to_s</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">version</span>.<span class="ruby-identifier">to_s</span> }
  <span class="ruby-identifier">keep</span>.<span class="ruby-identifier">concat</span>(<span class="ruby-identifier">move</span>)
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-i-post_sort" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">post_sort</span><span
                                class="method-args">(result, unlock, locked_version)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              <p>Specific version moves can’t always reliably be done during sorting as not all elements are compared against each other.</p>

                              <div class="method-source-code" id="post_sort-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 130</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">post_sort</span>(<span class="ruby-identifier">result</span>, <span class="ruby-identifier">unlock</span>, <span class="ruby-identifier">locked_version</span>)
  <span class="ruby-comment"># default :major behavior in Bundler does not do this</span>
  <span class="ruby-keyword">return</span> <span class="ruby-identifier">result</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">major?</span>
  <span class="ruby-keyword">if</span> <span class="ruby-identifier">unlock</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">locked_version</span>.<span class="ruby-identifier">nil?</span>
    <span class="ruby-identifier">result</span>
  <span class="ruby-keyword">else</span>
    <span class="ruby-identifier">move_version_to_end</span>(<span class="ruby-identifier">result</span>, <span class="ruby-identifier">locked_version</span>)
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-i-segments_do_not_match-3F" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">segments_do_not_match?</span><span
                                class="method-args">(a, b, level)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              

                              <div class="method-source-code" id="segments_do_not_match-3F-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 123</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">segments_do_not_match?</span>(<span class="ruby-identifier">a</span>, <span class="ruby-identifier">b</span>, <span class="ruby-identifier">level</span>)
  <span class="ruby-identifier">index</span> = [<span class="ruby-value">:major</span>, <span class="ruby-value">:minor</span>].<span class="ruby-identifier">index</span>(<span class="ruby-identifier">level</span>)
  <span class="ruby-identifier">a</span>.<span class="ruby-identifier">segments</span>[<span class="ruby-identifier">index</span>] <span class="ruby-operator">!=</span> <span class="ruby-identifier">b</span>.<span class="ruby-identifier">segments</span>[<span class="ruby-identifier">index</span>]
<span class="ruby-keyword">end</span></pre>
                              </div>
                            </div>


                          </div>

                  <div id="method-i-sort_dep_specs" class="method-detail ">
                            <div class="method-heading">
                              <span class="method-name">sort_dep_specs</span><span
                                class="method-args">(specs, package)</span>
                              <span class="method-click-advice">click to toggle source</span>
                            </div>

                            <div class="method-description">
                              

                              <div class="method-source-code" id="sort_dep_specs-source">
            <pre><span class="ruby-comment"># File bundler/gem_version_promoter.rb, line 92</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">sort_dep_specs</span>(<span class="ruby-identifier">specs</span>, <span class="ruby-identifier">package</span>)
  <span class="ruby-identifier">locked_version</span> = <span class="ruby-identifier">package</span>.<span class="ruby-identifier">locked_version</span>

  <span class="ruby-identifier">result</span> = <span class="ruby-identifier">specs</span>.<span class="ruby-identifier">sort</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">a</span>, <span class="ruby-identifier">b</span><span class="ruby-operator">|</span>
    <span class="ruby-keyword">unless</span> <span class="ruby-identifier">package</span>.<span class="ruby-identifier">prerelease_specified?</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">pre?</span>
      <span class="ruby-identifier">a_pre</span> = <span class="ruby-identifier">a</span>.<span class="ruby-identifier">prerelease?</span>
      <span class="ruby-identifier">b_pre</span> = <span class="ruby-identifier">b</span>.<span class="ruby-identifier">prerelease?</span>

      <span class="ruby-keyword">next</span> <span class="ruby-value">-1</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">a_pre</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-operator">!</span><span class="ruby-identifier">b_pre</span>
      <span class="ruby-keyword">next</span>  <span class="ruby-value">1</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">b_pre</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-operator">!</span><span class="ruby-identifier">a_pre</span>
    <span class="ruby-keyword">end</span>

    <span class="ruby-keyword">if</span> <span class="ruby-identifier">major?</span>
      <span class="ruby-identifier">a</span> <span class="ruby-operator">&lt;=&gt;</span> <span class="ruby-identifier">b</span>
    <span class="ruby-keyword">elsif</span> <span class="ruby-identifier">either_version_older_than_locked?</span>(<span class="ruby-identifier">a</span>, <span class="ruby-identifier">b</span>, <span class="ruby-identifier">locked_version</span>)
      <span class="ruby-identifier">a</span> <span class="ruby-operator">&lt;=&gt;</span> <span class="ruby-identifier">b</span>
    <span class="ruby-keyword">elsif</span> <span class="ruby-identifier">segments_do_not_match?</span>(<span class="ruby-identifier">a</span>, <span class="ruby-identifier">b</span>, <span class="ruby-value">:major</span>)
      <span class="ruby-identifier">b</span> <span class="ruby-operator">&lt;=&gt;</span> <span class="ruby-identifier">a</span>
    <span class="ruby-keyword">elsif</span> <span class="ruby-operator">!</span><span class="ruby-identifier">minor?</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-identifier">segments_do_not_match?</span>(<span class="ruby-identifier">a</span>, <span class="ruby-identifier">b</span>, <span class="ruby-value">:minor</span>)
      <span class="ruby-identifier">b</span> <span class="ruby-operator">&lt;=&gt;</span> <span class="ruby-identifier">a</span>
    <span class="ruby-keyword">else</span>
      <span class="ruby-identifier">a</span> <span class="ruby-operator">&lt;=&gt;</span> <span class="ruby-identifier">b</span>
    <span class="ruby-keyword">end</span>
  <span class="ruby-keyword">end</span>
  <span class="ruby-identifier">post_sort</span>(<span class="ruby-identifier">result</span>, <span class="ruby-identifier">package</span>.<span class="ruby-identifier">unlock?</span>, <span class="ruby-identifier">locked_version</span>)
<span class="ruby-keyword">end</span></pre>
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